<!DOCTYPE html>
<html>
    <head>
        <meta charset="UTF-8" />
        <title>demo</title>
    </head>
    <body>
        <script type="text/javascript" >
            // let x = {xuexiao:'school',xueke:'subject'}

            // let computed = {
            //     ...x
            // }

            let obj1 = {c:3,d:4}

            let obj2 = {a:1,b:2,...obj1,c:900}

        </script>
    </body>
</html>